[PATCH] D92953: [GlobalISel] Base implementation for sret demotion.

[Christudasan Devadasan via Phabricator via llvm-commits]

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If the return values can't be lowered to registers
SelectionDAG perform the sret demotion. This patch
contains the basic implementation for the same in
the GlobalISel pipeline.

Furthermore, targets should bring relevant changes
during lowerFormalArguments, lowerReturn and
lowerCall to make use of this feature.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D92953

Files:
  llvm/include/llvm/CodeGen/GlobalISel/CallLowering.h
  llvm/lib/CodeGen/GlobalISel/CallLowering.cpp
  llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
  llvm/lib/Target/AArch64/GISel/AArch64CallLowering.cpp
  llvm/lib/Target/AArch64/GISel/AArch64CallLowering.h
  llvm/lib/Target/AMDGPU/AMDGPUCallLowering.cpp
  llvm/lib/Target/AMDGPU/AMDGPUCallLowering.h
  llvm/lib/Target/ARM/ARMCallLowering.cpp
  llvm/lib/Target/ARM/ARMCallLowering.h
  llvm/lib/Target/Mips/MipsCallLowering.cpp
  llvm/lib/Target/Mips/MipsCallLowering.h
  llvm/lib/Target/PowerPC/GISel/PPCCallLowering.cpp
  llvm/lib/Target/PowerPC/GISel/PPCCallLowering.h
  llvm/lib/Target/RISCV/RISCVCallLowering.cpp
  llvm/lib/Target/RISCV/RISCVCallLowering.h
  llvm/lib/Target/X86/X86CallLowering.cpp
  llvm/lib/Target/X86/X86CallLowering.h
  llvm/tools/llvm-exegesis/lib/Assembler.cpp

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